package cn.tedu.ivos.application.service.impl;

import cn.tedu.ivos.application.mapper.ApplicationMapper;
import cn.tedu.ivos.application.pojo.dto.ApplicationQuery;
import cn.tedu.ivos.application.pojo.dto.ApplicationSaveParam;
import cn.tedu.ivos.application.pojo.entity.Application;
import cn.tedu.ivos.application.pojo.vo.ApplicationVO;
import cn.tedu.ivos.application.service.ApplicationService;
import cn.tedu.ivos.audit.mapper.AuditMapper;
import cn.tedu.ivos.audit.pojo.vo.AuditVO;
import cn.tedu.ivos.audit.service.AuditService;
import cn.tedu.ivos.base.enums.ApplicationStatusEnum;
import cn.tedu.ivos.user.mapper.UserMapper;
import cn.tedu.ivos.user.pojo.vo.UserVO;
import cn.tedu.ivos.vehicle.mapper.VehicleMapper;
import cn.tedu.ivos.vehicle.pojo.entity.Vehicle;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.StringJoiner;

@Slf4j
@Service
public class ApplicationServiceImpl implements ApplicationService {
    @Autowired
    ApplicationMapper applicationMapper;
    @Autowired
    AuditService auditService;
    @Autowired
    UserMapper userMapper;
    @Autowired
    AuditMapper auditMapper;
    @Autowired
    VehicleMapper vehicleMapper;
    @Override
    public void save(ApplicationSaveParam applicationSaveParam) {
        log.debug("保存申请单业务：applicationSaveParam={}",applicationSaveParam);
        Application application = new Application();
        BeanUtils.copyProperties(applicationSaveParam,application);
        //新增申请单,初始状态为"已发起"
        application.setStatus(ApplicationStatusEnum.PENDING.getCode());
        application.setCreateTime(new Date());
        /* 遇到的问题:新增申请单对应的审批单时,审批单数据没有此申请单id
        原因:执行insert方法的SQL时,并没有把刚刚生成的申请单id回填到application对象中
        解决办法:给此SQL上加useGeneratedKeys="true" keyProperty="id"属性
        效果:JDBC自动回填此申请单id到application对象的id属性中,再传给审批,审批就拿到申请单id了
        */
        applicationMapper.insert(application);
        //还需要为当前申请单生成对应的审批单数据
        auditService.insertAudit(application);
    }

    @Override
    public void cancel(Long id) {
        log.debug("撤销申请单业务：id={}",id);
        Application application = new Application();
        application.setId(id);
        //撤销需要将申请单状态改为"撤销"
        application.setStatus(ApplicationStatusEnum.CANCEL.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.update(application);
        //还需要删除此申请单对应的所有审批单数据
        auditMapper.deleteByApplicationId(id);
    }

    @Override
    public void distribute(Long applicationId, Long vehicleId) {
        log.debug("分配车辆业务:",applicationId,vehicleId);
        log.debug("分配车辆业务:applicationId={},vehicleId={}",applicationId,vehicleId);
        Application application = new Application();
        application.setId(applicationId);//设置要更新哪个申请单
        application.setVehicleId(vehicleId);//设置分配的是哪辆车
        application.setStatus(ApplicationStatusEnum.ALLOCATION.getCode());//设置申请单状态为60
        application.setUpdateTime(new Date());//设置更新时间
        applicationMapper.update(application);//数据层更新

        Vehicle vehicle = new Vehicle();
        vehicle.setId(vehicleId);//设置要更新哪辆车
        vehicle.setStatus("2");//设置车辆状态为占用
        vehicle.setUpdateTime(new Date());//设置更新时间
        vehicleMapper.update(vehicle);//数据层更新
    }

    @Override
    public List<ApplicationVO> selectApplication(ApplicationQuery applicationQuery) {
        log.debug("查询申请单业务:applicationQuery={}",applicationQuery);
        List<ApplicationVO> list = applicationMapper.selectApplication(applicationQuery);
        //遍历申请单集合，依次为每一个申请单VO补全审批人数据
        for (int i = 0; i<list.size();i++){
            ApplicationVO applicationVO = list.get(i);
            //
            assignAuditUserList(applicationVO);
        }
        return list;
    }
    /**
     * 本方法用于当前传入的ApplicationVO补全审批人数据，注意不会产生新的ApplicationVO！！
     * "审核人id集合" List<Long> auditUserIdList;=>[106,103]
     * "审核人姓名字符串" String auditUsernameList;=>"moly,tom"
     **/
    private void assignAuditUserList(ApplicationVO applicationVO) {
     //1.准备空集合，分别用来保存当前申请单对应的审批人id和姓名
        List<Long> auditUserIdList = new ArrayList<>();
        List<String> auditUsernameList = new ArrayList<>();
     //2.根据当前审批单id，查询此申请单所有的审批单
        List<AuditVO> auditVOList =
                auditService.selectAuditByApplicationId(applicationVO.getId());
     //3.遍历每一个审批单
        for(int i = 0;i<auditVOList.size();i++){
            AuditVO auditVO = auditVOList.get(i);
            //4.取出当前审批单的审批人id并存入空的id集合中
            Long id = auditVO.getAuditUserId();
            auditUserIdList.add(id);
            //5.根据审批人id,查询审批人姓名
            UserVO userVO = userMapper.selectById(id);
            auditUsernameList.add(userVO.getUsername());
        }
     //6.准备一个拼接工具，帮我们将多个审批人姓名连成指定格式的字符串
        StringJoiner stringJoiner = new StringJoiner(",");
        for(String username : auditUsernameList){
            stringJoiner.add(username);
        }
     //7. 将准备好的审批人姓名字符串与审批人的id集合赋值给当前的传入的ApplicationVO
        applicationVO.setAuditUsernameList(stringJoiner.toString());
        applicationVO.setAuditUserIdList(auditUserIdList);
    }
}
